Piston pump



The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawings will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a front view of a first embodiment of a piston pump in accordance with my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a view thereof from the lower end of FIG. 1;

FIG. 4 is a view thereof from the upper end of FIG. 1;

FIG. 5 is a view thereof from the right end of FIG. 1; and

FIG. 6 is a view from the left end of FIG. 1;

FIG. 7 is a front view of a second embodiment of a piston pump according to my design;

FIG. 8 is a rear view thereof

FIG. 9 is a view thereof from the lower end of FIG. 6;

FIG. 10 is a view thereof from the upper end of FIG. 6;

FIG. 11 is a view thereof from the right end of FIG. 6;

FIG. 12 is a view thereof from the left end of FIG. 6;

FIG. 13 is a front view of the third embodiment of a piston pump according to my design;

FIG. 14 is a rear view thereof

FIG. 15 is a view thereof from the lower end of FIG. 12;

FIG. 16 is a view thereof from the upper end of FIG. 12;

FIG. 17 is a view thereof from the right end of FIG. 12; and,

FIG. 18 is a view thereof from the left end of FIG. 12. 

The ornamental design for “piston pump,” as shown and described. 